Bushing for Spool (Filament) with Bearing
thingiverse
The spool bushing is modeled after Thing #3783, but you can modify it to suit reprapstore.com spools (with 54mm hole diameter). The bearing fits a 8mm rod and has an outer diameter of 22mm. However, it's not recommended to use the bearing due to insufficient friction; your spool may unroll too easily. Instead, try using a bushing without any bearing but with a 9mm hole diameter for a 8mm rod. Check out Thing #19015 and Thing #19016 for more details and print two of these bushings along with the bearings needed.
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